California Code, Water Code - WAT § 1841.5

(a) For the purposes of a device installed pursuant to Section 1840 or 1841 or a method of measurement proposed and adopted pursuant to Section 934 or 935 of Title 23 of the California Code of Regulations, any diverter who has completed an instructional course regarding the devices or measurement method included in the course administered by the University of California Cooperative Extension, including passage of a proficiency test before the completion of the course, shall be considered a qualified individual when installing and maintaining devices or implementing methods of measurement that were taught in the course for the diverter's diversion.  The proficiency test shall seek to certify that the diverter has a satisfactory understanding of the principles of measurement and the use of a measurement method included in the course or the installation of a device.  The University of California Cooperative Extension and the board shall develop the curriculum of the course and the proficiency test.  The University of California Cooperative Extension and the board shall ensure the course curriculum and the proficiency test do not conflict with any state licensing acts.

(b) For purposes of this section, “diverter” means an individual authorized to divert water under a valid water right, a lessee of property that is subject to a water right who is acting as a representative of the water right holder, or a bona fide employee of the water right holder or lessee.